In an Objective-C for-in loop "for (id element in collection) {}", the loop
will run 0 times if the collection is nil. This is because the for-in loop
is implemented using a protocol method that returns 0 when there are no
elements to iterate, and messages to nil will result in a 0 return value.

At some point we may want to actually model this message send, but for now
we may as well get the nil case correct, and avoid the false positives that
would come with this case.

<rdar://problem/13744632>

llvm-svn: 180639

Casts to bool (and _Bool) are equivalent to checks against zero,
not truncations to 1 bit or 8 bits.

This improved reasoning does cause a change in the behavior of the alpha
BoolAssignment checker. Previously, this checker complained about statements
like "bool x = y" if 'y' was known not to be 0 or 1. Now it does not, since
that conversion is well-defined. It's hard to say what the "best" behavior
here is: this conversion is safe, but might be better written as an explicit
comparison against zero.

More usefully, besides improving our model of booleans, this fixes spurious
warnings when returning the address of a local variable cast to bool.

<rdar://problem/13296133>

llvm-svn: 180638

llvm-svn: 180637

llvm-svn: 180636

[PCH/modules] Require the preprocessing record option to match the used PCH, if modules are enabled.

The preprocessing record becomes important when modules are enabled, since it is used to calculate the
module cache hash.

llvm-svn: 180635

[Modules] Fix an issue where the reconstructed redeclaration chain was incomplete, missing the definition from a module.

-Make sure that a deserialized external decl gets added to the TU scope.
-When associating an identifier with a set of decls, use the most recent local ones,
  if they exist, otherwise associating decls from modules (that came after a local one)
  will lead to an incomplete reconstructed re-declaration chain.

rdar://13712705

llvm-svn: 180634

llvm-svn: 180633

llvm-svn: 180632

TLVs probably won't be as common as the other types of variables. Check for them
last before defaulting to "DATA".

llvm-svn: 180631

Hopefully brings the windows buildbots back to life.

llvm-svn: 180630

a comment, grab the first comment found in its class
heirarchy. Also, when a category is mossing a comment,
grab comment of its primary class. // rdar://13647476

llvm-svn: 180629

gcc.  No test case included as I'm having problems finding a test case where
the inode/dev don't match.

llvm-svn: 180628

llvm-svn: 180627

Patch by Yuri Veselov.

llvm-svn: 180626

In -fparse-all-comments mode empty '//' comments were recognized as
RCK_Invalid, and were not merged with next and previous lines.

Patch by Amin Shali.

llvm-svn: 180625

For Mach-O there were 2 implementations for parsing object files. A
standalone llvm/Object/MachOObject.h and llvm/Object/MachO.h which
implements the generic interface in llvm/Object/ObjectFile.h.

This patch adds the missing features to MachO.h, moves macho-dump to
use MachO.h and removes ObjectFile.h.

In addition to making sure that check-all is clean, I checked that the
new version produces exactly the same output in all Mach-O files in a
llvm+clang build directory (including executables and shared
libraries).

To test the performance, I ran macho-dump over all the files in a
llvm+clang build directory again, but this time redirecting the output
to /dev/null. Both the old and new versions take about 4.6 seconds
(2.5 user) to finish.

llvm-svn: 180624

Mark tests as expected fail for Linux due to not being able to call/print c++ demangled functions in the global namespace (bugzilla 15854).

llvm-svn: 180623

llvm-svn: 180622

llvm-svn: 180621

We need to intialize this to something and since clang does not set
the shader type attribute and clang is used only for compute shaders,
initializing it to COMPUTE seems like the best choice.

Reviewed-by: Christian König <christian.koenig@amd.com>
llvm-svn: 180620

rdar://problem/13056109

llvm-svn: 180619

rdar://problem/13056109

llvm-svn: 180618

"hint" space for Thumb actually overlaps the encoding space of the CPS
instruction. In actuality, hints can be defined as CPS instructions where imod
and M bits are all nil.

Handle decoding of permitted nop-compatible hints (i.e. nop, yield, wfi, wfe,
sev) in DecodeT2CPSInstruction.

This commit adds a proper diagnostic message for Imm0_4 and updates all tests.

Patch by Mihail Popa <Mihail.Popa@arm.com>.

llvm-svn: 180617

llvm-svn: 180616

Since we can't guarantee that the original dbg.declare instrinsic
is removed by LowerDbgDeclare(), we need to make sure that we are
not inserting the same dbg.value intrinsic over and over.
This removes tons of redundant DIEs when compiling optimized code.

rdar://problem/13056109

llvm-svn: 180615

This fixes a problem on Linux where allocated memory would get overun in some use cases (ie. in TestExprs2.py).

llvm-svn: 180614

llvm-svn: 180613

llvm-svn: 180612

PowerPC: Use RegisterOperand instead of RegisterClass operands

In the default PowerPC assembler syntax, registers are specified simply
by number, so they cannot be distinguished from immediate values (without
looking at the opcode).  This means that the default operand matching logic
for the asm parser does not work, and we need to specify custom matchers.
Since those can only be specified with RegisterOperand classes and not
directly on the RegisterClass, all instructions patterns used by the asm
parser need to use a RegisterOperand (instead of a RegisterClass) for
all their register operands.

This patch adds one RegisterOperand for each RegisterClass, using the
same name as the class, just in lower case, and updates all instruction
patterns to use RegisterOperand instead of RegisterClass operands.

llvm-svn: 180611

llvm-svn: 180610

Re-write the address propagation code for pre-indexed loads/stores to take into account some previously misssed cases (PRE_DEC addressing mode, the offset and base address are swapped, etc). This should fix PR15581.

llvm-svn: 180609

PowerPC: Fix encoding of vsubcuw and vsum4sbs instructions

When testing the asm parser, I noticed wrong encodings for the
above instructions (wrong sub-opcodes).

Tests will be added together with the asm parser.

llvm-svn: 180608

PowerPC: Fix encoding of stfsu and stfdu instructions

When testing the asm parser, I noticed wrong encodings for the
above instructions (wrong sub-opcodes).  Note that apparently
the compiler currently never generates pre-inc instructions
for floating point types for some reason ...

Tests will be added together with the asm parser.

llvm-svn: 180607

PowerPC: Fix encoding of rldimi and rldcl instructions

When testing the asm parser, I noticed wrong encodings for the
above instructions (wrong operand name in rldimi, wrong form
and sub-opcode for rldcl).

Tests will be added together with the asm parser.

llvm-svn: 180606

PowerPC: Support PC-relative fixup_ppc_brcond14.

When testing the asm parser, I ran into an error when using a conditional
branch to an external symbol (this doesn't occur in compiler-generated
code) due to missing support in PPCELFObjectWriter::getRelocTypeInner.

llvm-svn: 180605

llvm-svn: 180604

llvm-svn: 180603

llvm-svn: 180602

On a 32 bit build this moves LinkageSpecDecl from 52 to 48 bytes.

llvm-svn: 180601

llvm-svn: 180600